In Telecomm, there is a possible way to determine whether an app is installed, without query permissions, due to improper input validation.

published 2022-03-30 4y ago modified 2026-06-17 4mo ago also EUVD-2021-26135

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits: 0; none known

In Telecomm, there is a possible way to determine whether an app is installed, without query permissions, due to improper input validation. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12LAndroid ID: A-196406138

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Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

n/a Android

Classification

Weakness

CWE-20 Improper Input Validation

References

source.android.com /security/bulletin/android-12l
vendor-advisory

Sources

CVE List CVE-2021-39778
NVD CVE-2021-39778

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